.sidebar-menu {
  width: 240px;
  height: 100%;
  background: #fff;
  border-right: 1px solid #e8e8e8;
  overflow-y: auto;
}

.menu-header {
  padding: 16px;
  border-bottom: 1px solid #e8e8e8;
}

.menu-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.menu-list {
  list-style: none;
  margin: 0;
  padding: 8px 0;
}

.menu-item-content {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.menu-item-content:hover {
  background-color: #f5f5f5;
}

.menu-item-content.active {
  background-color: #e6f7ff;
  color: #1890ff;
}

.menu-icon {
  margin-right: 8px;
  font-size: 16px;
}

.menu-title {
  flex: 1;
  font-size: 14px;
}

.expand-icon {
  font-size: 12px;
  transition: transform 0.3s;
}

.expand-icon.expanded {
  transform: rotate(180deg);
}

.submenu {
  list-style: none;
  margin: 0;
  padding: 0;
  background-color: #fafafa;
}

.submenu .menu-item-content {
  padding-left: 40px;
}
